356  SULPHATE  OF  QU1NIDINE. 
•with  the  lime  to  form  insoluble  lime  soap,  while  the  eliminated 
glycerin  remains  in  solution  in  the  water  along  with  the  excess 
of  lime.  After  it  has  been  sufficiently  boiled,  it  is  allowed  to 
cool  and  settle,  and  is  then  to  be  strained  through  a  crash  cloth. 
The  soap  is  reserved  for  sale  to  stearic  candle  makers,  or  else 
may  be  reconverted  into  saleable  fat  by  the  process  given  at  pp. 
432 — 445  Morfit's  "Applied  Chemistry" 
The  strained  liquid  contains  only  the  glycerin  and  excess  of 
lime.  It  must  be  carefully  concentrated  by  steam  heat.  During 
evaporation,  a  portion  of  the  lime  is  deposited  on  account  of  its 
lesser  solubility  in  hot  than  in  cold  water.  The  remainder  is 
removed  by  treating  the  evaporated  liquid  with  a  current  of 
carbonic  acid  gas,  boiling  by  steam  heat,  to  convert  any  soluble 
fo'-carbonate  of  lime  that  may  have  been  formed,  into  insoluble 
neutral  carbonate,  allowing  repose,  decanting  or  straining  off 
the  clear  supernatant  liquid  from  the  precipitated  carbonate  of 
lime,  and  further  evaporating,  as  before,  if  necessary,  to  drive  off 
any  excess  of  water. 
As  nothing  fixed  or  injurious  is  employed  in  the  process,  the 
glycerin  thus  prepared,  will  be  absolutely  pure. 
Baltimore,  Md.,  March,  1853.  SiUiman's  Journal 
SULPHATE  OF  QUI  NIDI  NE. 
There  has  been  recently  distributed  among  commercial  men  a 
circular  without  date  or  signature  and  with  no  indication  of  its 
origin,  announcing  a  large  adulteration  of  the  sulphate  of  quinine 
by  a  product  little  known,  the  sulphate  of  quinidine.  It  has 
excited  much  interest  among  dealers  in  quinine,  and  many  me- 
thods have  been  suggested  for  detecting  the  presence  of  quinidine 
in  sulphate  of  quinine. 
This  new  organic  base  has  been  studied  successively  by  MM. 
Henry  and  Delondre,  Winckler,'  Howard,  Zimmer,  and  Leers. 
MM.  Henry  and  Delondre,  its  discoverers,  considered  it  a 
hydrate  of  quinine.  MM.  Winckler  and  Leers  examined  a  pro- 
duct made  by  M.  Zimmer,  of  Frankfort,  and  did  not  derive 
their  quinidine  from  the  incriminated  quinquinas  ;  moreover,  they 
give  no  processes  for  obtaining  the  substance.    M.  Howard  has 
